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Small Intestine: Imaging Approach and Differential Diagnosis

Embryology and Congenital Malformations The small intestine and the right side of the colon constitute the embryologic midgut, which herniates into the umbilical cord during the process of marked elongation in fetal development. Following a 270° counterclockwise rotation, the midgut returns to the peritoneal cavity. Errors during this complex series of events are common, resulting in varying degrees of malrotation ± volvulus. This may result in…

Gastroparesis

KEY FACTS Terminology Objectively delayed gastric emptying in absence of mechanical obstruction You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here

Zollinger-Ellison Syndrome

KEY FACTS Terminology Severe peptic ulcer disease associated with marked ↑ in gastric acid due to gastrin-producing pancreatic neuroendocrine tumor (gastrinoma) You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here

Gastritis and Duodenitis

KEY FACTS Terminology Inflammation of gastric mucosa induced by group of disorders that differ clinically but share similar imaging features Common etiologies include Helicobacter  pylori , NSAIDs, steroids, alcohol and coffee, stress Imaging CT: Thickened gastric wall with submucosal edema Close to water density CT for global view and concern for extragastric complications (e.g., perforation) Upper GI series best for mucosal detail Mucosal erosions surrounded by…